智能冲击压路机路基压实度自动检测方法
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摘要
为了提高路基压实度检测的准确性,提出了路基压实度自动检测的瑞雷波法。采用落锤法敲击地表产生瑞雷波,分别通过检波器和地震仪采集和记录瑞雷波信号,应用-τp变换提取经过信息处理后的瑞雷波,获取频散曲线,利用瑞雷波反演横波速度的方法计算压实度,分析了压实度分布剖面图信息,对比了用瑞雷波法和灌砂法计算的路基压实度。计算结果表明:两条压实度曲线几乎重叠,最大绝对误差为-0.300%,相对误差为0.308%,说明用瑞雷波法检测路基压实度数据可靠,可以用于控制冲击碾压施工。
In order to improve the compactness detecting accuracy of subgrade,Rayleigh wave method was put forward to detect the degree of compaction of subgrade.Rayleigh wave was brought by using dropping hammer,its signal was detected by using detector,and recorded by using earthquake instrument.Processed Rayleigh wave was extracted by using τ-p transform,and its dispersion curve was obtained.The shear velocity of subgrade was invertely computed according to Rayleigh wave,the degree of compaction was computed according to the velocity,its profile diagram was analyzed,and it was detected by using Rayleigh wave method and pouring sand method,and the detecting results were compared.Comparison result shows that the compactness curves almost lap,the maximal absolute error is-0.300%,the maximal relative error is 0.308%,which indicates that the detecting result is credible,and the method is feasible to control impact rolling construction.1 tab,7 figs,12 refs.
In order to improve the compactness detecting accuracy of subgrade,Rayleigh wave method was put forward to detect the degree of compaction of subgrade.Rayleigh wave was brought by using dropping hammer,its signal was detected by using detector,and recorded by using earthquake instrument.Processed Rayleigh wave was extracted by using τ-p transform,and its dispersion curve was obtained.The shear velocity of subgrade was invertely computed according to Rayleigh wave,the degree of compaction was computed according to the velocity,its profile diagram was analyzed,and it was detected by using Rayleigh wave method and pouring sand method,and the detecting results were compared.Comparison result shows that the compactness curves almost lap,the maximal absolute error is-0.300%,the maximal relative error is 0.308%,which indicates that the detecting result is credible,and the method is feasible to control impact rolling construction.1 tab,7 figs,12 refs.
引文
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[11]李修忠.瞬态瑞雷波法在高速公路路基勘察中的应用[J].公路,2005,50(2):135-138.Li Xiu-zhong.Method of transient Rayleigh wave applied ininvestigation of expressway roadbed[J].Highway,2005,50(2):135-138.(in Chinese)
[12]张宜洛,郑南翔,顾炳其.中粗粒土路基压实度快速测定方法[J].中国公路学报,2006,19(5):29-33.Zhang Yi-luo,Zheng Nan-xiang,Gu Bing-qi.Compactnessrapid measurement method on middle coarse grained soil sub-grade[J].China Journal of Highway and Transport,2006,19(5):29-33.(in Chinese)
[2]景宏君,张斌.黄土地区公路路基冲击压实试验[J].长安大学学报:自然科学版,2004,24(1):25-29.Jing Hong-jun,Zhang Bin.Experi ments of highway subgradei mpact compaction in loess region[J].Journal of Chang anUniversity:Natural Science Edition,2004,24(1):25-29.(in Chinese)
[3]杨成林.瑞雷波勘探[M].北京:地质出版社,1993.
[4]张建清.浅层地震多波勘探新技术研究[J].工程勘察,2001,29(6):65-68.Zhang Jian-qing.Research on the new exploration techniqueof multi wave for shallowearthquake[J].Geotechnical Inves-tigation and Surveying,2001,29(6):65-68.(in Chinese)
[5]王飞荣.利用瑞雷面波法测定软土地基强夯加固的效果[J].江西煤炭科技,2002,24(4):22-23.Wang Fei-rong.Using Rayleigh wave to test the effect ofsoft-soil foundationin heavy compacting[J].Jiangxi Coal Sci-ence and Technology,2002,24(4):22-23.(in Chinese)
[6]顾汉明,宋先海,刘江平,等.用瞬态瑞雷波反演横波速度评价高速公路压碾效果[J].地质科技情报,2001,20(2):100-102.Gu Han-ming,Song Xian-hai,Liu Jiang-ping,et al.Evalu-tion of the effect of compaction highway surface using shearvelocity inversed by instantaneous Rayleigh wave[J].Geo-logical Scince and Technology Information,2001,20(2):100-102.(in Chinese)
[7]Xia J,Miller R D,Park C B.Multichannel analysis of surfacewaves to map bedrock[J].The Leading Edge,1999,18(12):1 392-1 396.
[8]王家映.地球物理反演理论[M].武汉:中国地质大学出版社,1998.
[9]杨成林,时福荣,李从信,等.应用瑞雷波等方法对公路质量进行无损检测[J].物探与化探,1996,20(2):104-115.Yang Cheng-lin,Shi Fu-rong,Li Cong-xin,et al.The applica-tion of Rayleigh wave and some other methods to non-destructiveinspection of highway quality[J].Geophysical and GeochemicalExploration,1996,20(2):104-115.(in Chinese)
[10]徐仲达.地震波理论[M].上海:同济大学出版社,1997.
[11]李修忠.瞬态瑞雷波法在高速公路路基勘察中的应用[J].公路,2005,50(2):135-138.Li Xiu-zhong.Method of transient Rayleigh wave applied ininvestigation of expressway roadbed[J].Highway,2005,50(2):135-138.(in Chinese)
[12]张宜洛,郑南翔,顾炳其.中粗粒土路基压实度快速测定方法[J].中国公路学报,2006,19(5):29-33.Zhang Yi-luo,Zheng Nan-xiang,Gu Bing-qi.Compactnessrapid measurement method on middle coarse grained soil sub-grade[J].China Journal of Highway and Transport,2006,19(5):29-33.(in Chinese)
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